Date: Tue, 9 Aug 2011 01:03:42 +0400 From: Lev Serebryakov <lev@serebryakov.spb.ru> To: Adrian Chadd <adrian@freebsd.org> Cc: freebsd-wireless@freebsd.org Subject: Re: Bad host-vased AP performace -- and qouple of questions about FreeBSD WiFi stack tuning Message-ID: <693584315.20110809010342@serebryakov.spb.ru> In-Reply-To: <CAJ-VmonrRTRrvR9PWexxVzRzEGS9AW8%2BtZLZqUN1aZT9Uvoqqg@mail.gmail.com> References: <1151152206.20110808220720@serebryakov.spb.ru> <CAJ-VmomMh4uvyJGHHkGsi5_C4p3ZJjRwadmstRVe4BjY76QzoA@mail.gmail.com> <1832976164.20110808222108@serebryakov.spb.ru> <CAJ-VmonrRTRrvR9PWexxVzRzEGS9AW8%2BtZLZqUN1aZT9Uvoqqg@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
Hello, Adrian. You wrote 8 августа 2011 г., 22:26:54: > That's definitely required knowledge. 8.0-RELEASE is a good starting point. > I'm afraid it's going to be difficult for me to narrow down what's > changed without you doing a bit of legwork to find which kernel > version(s) introduced the performance regression. > Once we narrow that down, I'll fix it. :) > Please keep everything else the same though, including the laptop. :) It seems, that 8.0-RELEASE behaves slightly different from very fresh 8-STABLE, but I can not say that it is much better. It is output from `list sta' when notebook (client) is placed exactly the same point as previous experiment: 00:18:de:08:e8:1d 1 9 36M 17.5 0 54585 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 36M 16.0 0 55126 46112 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 36M 17.5 0 55648 50832 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 36M 16.0 0 56169 55632 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 36M 16.0 0 56615 59664 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 24M 16.0 0 57195 65072 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 24M 17.5 0 57936 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 24M 17.0 0 58178 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 24M 16.0 0 58903 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 24M 16.5 0 59465 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 54M 17.5 0 59954 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 54M 17.5 0 60591 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 36M 16.0 0 61343 41344 EPS AQE RSN WME It looks like it doesn't drop under 24M now. BUT! When I move notebook into direction of AP (into other room, which is near AP) I've got: 00:18:de:08:e8:1d 1 9 12M 29.0 0 21255 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 12M 28.0 0 22031 46560 EPS AQEP RSN WME 00:18:de:08:e8:1d 1 9 12M 30.5 0 22291 46576 EPS AQEP RSN WME 00:18:de:08:e8:1d 1 9 12M 30.5 0 22291 46576 EPS AQEP RSN WME 00:18:de:08:e8:1d 1 9 12M 30.5 0 22291 46576 EPS AQEP RSN WME 00:18:de:08:e8:1d 1 9 12M 30.5 0 22291 46576 EPS AQEP RSN WME And after door is closed: 00:18:de:08:e8:1d 1 9 12M 23.0 0 27276 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 12M 22.0 0 27789 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 11M 22.5 0 28134 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 11M 22.5 0 28730 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 11M 21.5 0 29040 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 11M 21.5 0 29369 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 12M 22.5 0 29822 41344 EPS AQE RSN WME 00:18:de:08:e8:1d 1 9 11M 21.0 0 30232 41344 EPS AQE RSN WME Better RSSI but much worse speed?! I don't have second notebook on hands now to monitor does speed hops up and down, but ``ifconfig wlan0 list sta'' every second gives all this output. It looks like it never works at full and stable 54M now, even if notevook in direct sight to AP within ~1 meter: 00:18:de:08:e8:1d 1 9 36M 37.5 0 44443 53936 EPS AQEP RSN WME 00:18:de:08:e8:1d 1 9 36M 37.5 0 44443 53936 EPS AQEP RSN WME 00:18:de:08:e8:1d 1 9 36M 37.5 0 44443 53936 EPS AQEP RSN WME 00:18:de:08:e8:1d 1 9 36M 37.5 0 44443 53936 EPS AQEP RSN WME 00:18:de:08:e8:1d 1 9 36M 37.5 0 44443 53952 EPS AQEP RSN WME 00:18:de:08:e8:1d 1 9 36M 37.5 0 44443 53984 EPS AQEP RSN WME And it seems, that in any other situation it works worse, that it theoretically can. Unfortunately, mini-PCI WiFi cards is not easy to get (and almost impossible to borrow for free, even for short time) here, and I can not replace this card in AP and try with another one :( I'll try to build 7-STABLE system, but it will take more time, as I need to adapt configs for it. -- // Black Lion AKA Lev Serebryakov <lev@serebryakov.spb.ru>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?693584315.20110809010342>